Repairing and replacing chimney crowns in Country Walk
We tell you what can stay on your chimney top and what has to come off, with the reasons.
- Owned and run locally
- Available for same-day service
- Fully licensed and insured
- Family owned and run
What a failing crown shows from the ground
- Moss or growth holding on the crown
- Loose cap fixings set into the concrete
- No overhang past the brick face
- Pieces missing from the crown corners
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Crown sealing, patching and rebuilding
Fine surface cracks on an otherwise firm crown
Hairline cracks are common in cast concrete. Brick industry guidance treats shrinkage of a cast crown as certain while it cures. The question is whether the cracks stay shallow or reach through the crown.
On a firm crown with fine surface cracks, a brushable crown coating can bridge them and keep water out. We confirm that the concrete around each crack is sound before recommending it. If the cracks open into loose sections, a coating is the wrong tool, and we explain the alternative.
What a coating cannot hold together
The coating data sheet we follow says the surface must be structurally sound and not loose. Its product warranty also excludes spalling and faulty construction. That tells you the product protects a good crown rather than rebuilding a bad one.
If your crown has crumbling edges, hollow patches or sections that move when pressed, we do not recommend a coating over them. Rather than a membrane over failing concrete, we remove what is unsound and discuss a new crown. You see both options explained before any decision is made.
Crowns that surround more than one flue
Some chimneys carry several flues through one crown. Each liner needs its own sealed joint, and the crown must slope away from all of them. The spaces between flues are where water tends to sit if the shape is wrong.
We check each flue opening in turn and note which ones are in use. If an appliance vents into one of the flues, the work is planned so that flue stays open and working. Tell us about every appliance connected to the chimney when you book, so nothing is missed.
Measuring the chimney top for a precast crown
A precast crown has to fit the chimney it sits on. The outside dimensions, the overhang and every flue opening must match the real top, not an estimate from the ground. Flues that are not centered make measuring more important.
We measure during the inspection or a follow-up visit before ordering a precast unit. If the top is irregular, forming a crown in place may be the better choice. We explain which approach suits your chimney and what either means for scheduling.
Separate lines for crown, cap and flue
- Aftercare instructions for the new surface
- Workmanship warranty on agreed crown work
- Sealant type and backer material at the flue
- Upfront price for each crown item
Crown repair answers for Country Walk
When can the fireplace be used again after crown work?
That depends on the product and the weather during curing. We give you waiting instructions for the material actually used on your chimney. Follow them even if the surface looks dry, because curing continues after the top looks finished.
Will you tell me if the brick under the crown is damaged?
Yes. Once the old crown is off, the top courses are easy to see. If loose brick or failed joints turn up, we stop, show you the condition and price that work as a separate item before continuing.
Can I coat the crown myself with a product from the store?
A crown coating only works on firm, clean and dry concrete, and it cannot hold loose pieces together. Roof work also carries real risk. If you are considering it, ask us first whether your crown is a suitable surface for any coating.
More Ways to Care for Your Fireplace
- Stone Chimney RepairRepair affected stone chimney surfaces with the supporting construction and visual match considered together.
- Chimney Chase Cover ReplacementReplace the chase top with a properly planned cover and clearly defined pipe connections.
- Chimney Flashing RepairRepair the chimney-to-roof connection with a scope that accounts for the adjoining roofing and masonry.
- Chimney Masonry RepairRepair affected chimney brickwork and joints with materials selected for the construction already in place.
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Local service. Careful repairs. A fireplace worth coming home to.
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Chimney & Fireplace Brands We Work With
DuraVent 
Olympia Chimney and Venting 
Copperfield Chimney Supply 
Rutland 
Heatilator 
Heat & Glo